haarder vs red mullet

haarder

noun
  • Planiliza haematocheilus, the redlip mullet, a mugilid fish. 

red mullet

noun
  • any fish of the genus Mullus in the family Mullidae 

  • Synonym of goatfish (fish of the family Mullidae) 

How often have the words haarder and red mullet occurred in a corpus of books? (source: Google Ngram Viewer )